Business Secretary Kwasi Kwarteng said soldiers would be delivering fuel later this week, after days of queues.
He said things had been difficult but denied there was a fuel supply crisis.
Some 150 military drivers are ready to drive the fuel tankers, with another 150 Army personnel are ready to support them.
Fuel suppliers and retailers, including Shell UK, BP and Esso, said in a statement issued by the Department for Business, Energy and Industrial Strategy, "We remain confident that the situation will stabilise further in the coming days and encourage everyone to fill up as they normally would help forecourts return to normal." The industry statement also said there had "Always been plenty of fuel at our refineries and terminals" and welcomed the deployment of the reserve tanker fleet.
The Petrol Retailers Association said there were "Encouraging signs" the pressure was starting to ease at the pumps, with forecourts taking further fuel deliveries.
The PRA, which represents nearly 5,500 of the UK's 8,000 stations, said 27% of sites had run out of fuel on Wednesday - compared with two-thirds being without on Sunday.
Sir Keir Starmer used his first in-person conference speech as Labour leader on Wednesday to criticise the government's handling of fuel supply issues.
